JP4864592B2 - Mobile communication terminal and system having the mobile communication terminal - Google Patents

Description

The present invention relates to a mobile communication terminal such as a mobile phone that can communicate via a mobile communication network, and a system including the mobile communication terminal .

Conventionally, as a mobile communication terminal of this type, in addition to a function of transmitting / receiving a telephone or mail via a mobile communication network, one that can communicate with another electronic device near the mobile communication terminal is known. ing. For example, a mobile phone is known that transmits a content playback signal generated by continuously playing back a content such as music to another electronic device (external remote device) such as a headphone set by wireless communication and outputs the signal ( Patent Document 1). This mobile phone is convenient because it is not necessary to connect the mobile phone body and an electronic device such as a headphone set with a cable. There is also known a mobile phone capable of performing personal authentication and settlement by communicating with a ticket gate at a station or a cash register at a store. There is also known a mobile phone that can play a game in progress with other mobile phone users by performing communication between a plurality of nearby mobile phones.
JP 2004-120651 A

In the above-described conventional mobile phone, non-public wireless communication for short distance such as Bluetooth (registered trademark) that can encrypt and transmit information for communication with other electronic devices in order to enhance communication security. Is used. In this short-distance non-public wireless communication, in order to further enhance the security of communication, the user authentication information is input to the user every time the connection establishment process with the electronic recording device is performed, and the user authentication The key information used for the encryption may be generated using the information. In this case, communication with a high security level can be performed with other electronic devices.
However, in the conventional mobile phone, communication history information including information used for establishing a connection with another electronic device remains stored in the mobile phone body. There is a possibility that communication with the electronic device may be performed illegally by a person. When the user authentication information is input to the user when establishing a connection with the electronic device, unauthorized use of communication with the electronic device is performed by performing user authentication using the user authentication information. Can be prevented. However, when establishing a connection without performing such user authentication, communication with an electronic device is likely to be performed illegally by performing a connection establishment process using the communication history information remaining in the memory in the mobile phone.

The present invention has been made under the above background. The purpose is to provide a mobile communication terminal capable of improving security when transmitting / receiving information to / from other electronic devices by short-range non-public wireless communication, and a system including the mobile communication terminal It is to be.

In order to achieve the above object, the invention of claim 1 is a mobile communication terminal capable of communicating via a mobile communication network, and performs short-distance non-public wireless communication with other electronic devices. A communication interface unit; a control unit that controls the communication interface unit to start the short-range non-public wireless communication based on a connection request; and a storage unit that stores information. A connection request that requests the user to input user authentication information when establishing a connection with another electronic device, and does not require the user to input the user authentication information when establishing the connection. connection request and are used, the control unit activates an application program capable of short-range non-public wireless communication in the master mode, a non-public wireless communication capable application programs for the near distance It searches for other electronic devices that are activated in the slave mode and are in the connection standby state, and passes the search results to the application program in the master mode, and is in the connection standby state in which the slave mode application program is activated. Connection for short-distance non-public wireless communication with another discovered electronic device based on a connection request generated by the master mode application program when another electronic device is discovered In the case of a connection request that does not require input of the user authentication information when the short-range non-public wireless communication with the other electronic device is completed after executing the establishment process, the other electronic device Control is performed so that communication history information including information used for establishing a connection with a device does not remain in the storage unit. In this mobile communication terminal, when a connection request for requesting the user to input user authentication information when the connection establishment with other electronic devices, the user authentication information input by the user By performing user authentication based on the above, it is possible to prevent non-public wireless communication for short distances between the mobile communication terminal and other electronic devices by unauthorized users. And in this case, even if communication history information including information used for establishing a connection with the other electronic device is left in the storage unit, communication by an unauthorized user can be prevented by the user authentication. Efficiency of the connection establishment process using the communication history information can be improved. On the other hand, in the case of a connection request that does not require the user to input user authentication information, communication history information including information used for establishing a connection with the other electronic device should not be left in the storage unit. This prevents non-public wireless communication for short distances with other electronic devices by unauthorized users who illegally used communication history information.

Further, in the mobile communication terminal of this, according to the type of the generated connection request by an application program executed on the application execution environment it can determine whether to leave the communication history information in the storage unit.

According to a second aspect of the present invention, in the mobile communication terminal of the first aspect, the communication history information includes identification information of the electronic device used for establishing a connection with the other electronic device. It is what. In this mobile communication terminal, it is possible to prevent short-distance non-public wireless communication with another electronic device by an unauthorized user using communication history information including identification information of the electronic device.

The invention according to claim 3 is the mobile communication terminal according to claim 1 or 2 , wherein the communication history information includes identification information of a service used in communication with the other electronic device. To do. In this mobile communication terminal, it is possible to prevent short-range non-public wireless communication with another electronic device by an unauthorized user using communication history information including service identification information.

According to a fourth aspect of the present invention, in the mobile communication terminal of the first, second or third aspect , the communication history information is key information used for encrypting information transmitted / received to / from the other electronic device. It is characterized by including. In this mobile communication terminal, it is possible to prevent short-range non-public wireless communication with other electronic devices by an unauthorized user using communication history information including key information.
The invention of claim 5 starts an application program capable of short-distance non-public wireless communication between the mobile communication terminal of claim 1, 2, 3 or 4 and the mobile communication terminal. It is a system provided with an electronic device that can be used.

  According to the present invention, in the case of a connection request that requires the user to input user authentication information, by performing user authentication with the user authentication information, it is possible to connect with other electronic devices by unauthorized users. Prevent non-public wireless communication for short distances between. In the case of a connection request that does not require the user to input the user authentication information, the communication history information is not left in the storage unit, whereby another electronic device by an unauthorized user using the communication history information is stored. Prevent non-public wireless communication for short distances between Therefore, there is an effect that it is possible to improve security when information is transmitted / received to / from another electronic device by non-public wireless communication for short distance.

  Hereinafter, an embodiment in which the present invention is applied to a mobile phone as a mobile communication terminal will be described. The mobile phone according to the present embodiment can transmit and receive information to and from electronic devices such as other mobile phones and external remote devices by short-range non-public wireless communication. This non-public wireless communication for short distance is a wireless communication based on a technical specification called Bluetooth (registered trademark), and is a radio wave modulated by a spread spectrum method in an ISM (Industry Science Medical) band of 2.4 GHz. Is used. When this wireless communication is used, even if there is an obstacle between devices about 10 m away, communication resistant to noise and interference can be performed at a communication speed of about 1 Mbps or 2 Mbps.

  FIG. 1 is a schematic configuration diagram illustrating an example of a mobile phone 10 according to the present embodiment. FIG. 2 is an external view of the mobile phone 10. The cellular phone 10 according to the present embodiment is a cellular phone having a casing structure including a main body 101 and a lid 102 that can swing with respect to a hinge 100. The mobile phone 10 includes a main control unit 120, an internal memory 121 as a storage unit, a wireless communication unit 122 and an antenna 111 as communication means for communication via a mobile phone communication network (public communication network). Yes. Furthermore, the mobile phone 10 includes a communication interface unit 127 and an antenna 128 for short-distance non-public wireless communication.

  The main control unit 120 includes, for example, a CPU, a cache memory, a ROM, a system bus, and the like, and transmits and receives data to and from each unit such as the internal memory 121 and the wireless communication unit 122 by executing a predetermined control program. And control each part. A microphone 108 and a speaker 109 are connected to the main control unit 120 via an audio processing unit 123, and a display unit 125 is connected via an image processing unit 124. Further, a key operation unit 126 is also connected to the main control unit 120.

The speaker 109 may be configured by separately providing a receiver speaker (receiver) for listening to a voice during a call and an external output speaker for outputting a ring tone, music, or the like. You may comprise by one speaker so that the speaker for receivers and the speaker for external outputs may be combined.
In addition to the speaker 109, an earphone connection terminal 113 is also provided so that an earphone cable can be connected. Content such as music can be output from both the speaker 109 and the earphone, or can be output from only the earphone.

  The display unit 125 is provided on the lid unit 102 side, and is configured using the liquid crystal display 110 or the like. Various kinds of information such as characters and images are displayed on the display unit 125.

  The key operation unit 126 includes a data input key 103 (ten keys, * key, # key), a call start key 104, an end key 105, a scroll key 106, a multi-function key 107, and the like. The key operation unit 126 is used for making and receiving calls, scrolling information displayed on the display unit 125, inputting data, selecting a menu, and the like.

  The internal memory 121 is constituted by a semiconductor memory such as a RAM or a ROM, and stores a control program executed by the main control unit 120 and various data. The internal memory 121 stores content data such as images, music, and programs downloaded from an information providing site, sound data output from the speaker 109, image data displayed on the display unit 125, and the like. You can also do it. The internal memory 121 is also used as a storage unit that stores communication history information including information used for establishing a connection when communication with another electronic device 20 is started.

  The wireless communication unit 122 is controlled by the main control unit 120, and performs wireless communication with a base station of a mobile phone communication network as a mobile communication network through an antenna 111 by a predetermined communication method. Through this wireless communication, voice telephone communication can be performed with a specific mobile phone or the like, and data communication such as transmission / reception of e-mails or content download from an information providing site can be performed.

  The communication interface unit 127 is controlled by the main control unit 120 and establishes a communication link of Bluetooth (registered trademark) that is a non-public wireless communication for short distance with the external remote device 20 to perform communication. The communication interface unit 127 is controlled by the main control unit 120 and transmits / receives signals, information, and data to / from the electronic device 20 using a predetermined profile.

  In the mobile phone 10 according to the present embodiment, the communication module 112 integrally configured with the communication interface unit 127 and the antenna 128 is detachably provided.

  In addition, the mobile phone 10 according to the present embodiment performs communication by the communication interface unit 127 based on a command from an application program (hereinafter, abbreviated as “application” as necessary) executed in the application execution environment. Can be controlled.

  FIG. 3 is an explanatory diagram of a software structure in the mobile phones 10 and 20 that can execute the application. The virtual application execution environment (virtual machine) built on the hardware such as the CPU and RAM is software such as a class library, an execution environment management library, and application management used for an application developed by object-oriented programming. And manage the execution environment of the application. This application execution environment is appropriately selected according to the application to be executed. For example, if the application to be executed is described in JAVA (registered trademark), the JAVA (registered trademark) application execution environment is selected. When the application to be executed is described in C language that operates in the BREW (registered trademark) execution environment, the BREW (registered trademark) application execution environment is selected. If the application to be executed is described in JAVA (registered trademark), it is possible to construct a JAVA (registered trademark) application execution environment on the BREW (registered trademark) application execution environment. Can be executed.

  An application can call and use a class library such as a function in the application execution environment via a class library API (application interface). The application execution environment also saves various data used for executing the application in the application storage area. When these various data are used, they are read from or written to the application storage area. The execution environment management library in the application execution environment can be used by calling the phone platform library in the native phone platform via the phone platform API.

As the telephone platform API, “SessionManager.open” and “SessionManager.openSecured” which are connection requests for starting communication with the external electronic device 20 by the communication interface unit 127 are prepared. "SessionManager.open" is API of the user authentication request without that do not require the user to enter a PIN (Personal Identification Number) as the user authentication information when the connection establishment with other electronic devices 20 is there. On the other hand, “SessionManager.openSecured” is an API with a user authentication request that requests the user to input a PIN when establishing a connection with another electronic device 20.

  The above-described main control unit 120 exchanges control commands and various data with the application execution environment, and performs control in cooperation with these. The main control unit 120 corresponds to the lowermost “telephone platform” in the software structure of FIG. 3, and executes a control program and user interface for controlling the telephone communication unit and the like, and provides a telephone platform library. To do. This telephone platform executes various processes in the application by sending an event to the execution environment management library in the application execution environment, and the application management software in the application execution environment via the application management API. It can be called and used. When the application execution environment calls and uses the telephone platform library via the telephone platform API, the telephone platform executes processing according to the telephone platform library. For example, the telephone platform reads data stored in the platform storage area managed by the telephone platform in the internal memory based on an instruction from the application execution environment using the telephone platform library, and stores the data in the application storage area. Can be migrated.

  FIG. 4 shows an example of Bluetooth (registered trademark) wireless communication (hereinafter referred to as “BT communication”) for executing an application such as a game in cooperation between the mobile phone 10 and another electronic device 20. It is a sequence diagram. This example shows a case where the other electronic device 20 is a mobile phone, that is, a case where BT communication is performed between two mobile phones. The connection establishment process for establishing a communication link may be performed from the mobile phone 10 side as in the example of FIG. 4 or may be performed from the mobile phone 20 side of another electronic device. The following device search and service search may be omitted if necessary information is known in advance.

  First, when an application (for example, a game application) using BT communication is started in the slave mode on the mobile phone 20 on the slave side, a connection wait start request (SessionMember.open) is sent from the application to the application execution environment. The application execution environment passes a predetermined API to the telephone platform side based on the connection waiting start request. As a result, the mobile phone 20 on the slave side can respond to device search, service search, connection request, etc. from the mobile phone 10 on the master side.

  Next, when an application using BT communication is activated in the master mode in the master-side mobile phone 10, the following device search process and service search process are executed. For example, in the mobile phone 10 that performs device search processing, a device search start request (startDeviceSeek) is sent from the application to the application execution environment. Accordingly, the mobile phone 10 transmits a device inquiry (Inquiry) for searching for a device, and searches for a peripheral Bluetooth (registered trademark) compatible device. In response to the device inquiry (Inquiry) from the master-side mobile phone 10, the slave-side mobile phone 20 returns a response (Response) together with device identification information such as a device name or a device address. Upon receiving this answer, the mobile phone 10 sends a device discovery notification (foundDevice) from the application execution environment to the application. In the mobile phone 10 that performs the service search process, a service search start request (startServiceSeek) is sent from the application to the application execution environment. As a result, the mobile phone 10 searches the slave-side mobile phone 20 for a corresponding service. The mobile phone 20 on the slave side returns service identification information such as a service name and profile name supported by the mobile phone 20 as an answer to the service search from the mobile phone 10. Upon receiving this answer, the mobile phone 10 sends a service discovery notification (foundService) from the application execution environment to the application.

  Next, in the mobile phone 10 on the master side, a connection request (SessionManager.open) is sent from the application to the application execution environment. The application execution environment passes a predetermined API to the telephone platform side based on the connection request. As a result, a predetermined connection establishment process is executed between the master-side mobile phone 10 and the slave-side mobile phone 20 based on the searched device identification information, service identification information, and the like. In this connection establishment process, key information used for encryption of information transmitted / received between the mobile phones 10 and 20 may be transferred. When the connection establishment process is completed, each of the mobile phones 10 and 20 sends a connection completion response (SessionListner.gotConnectionStatus) from the application execution environment to the application.

  After the connection establishment process is completed, BT communication is performed between the master mobile phone 10 and the slave mobile phone 20 by executing an application. When the BT communication is completed, the communication history information including the information used for establishing the connection temporarily stored in the internal memory 121 is deleted in each of the mobile phones 10 and 20. The information used for connection establishment is, for example, device identification information and service identification information used for the connection establishment processing, and key information used for encrypted communication of both mobile phones.

  FIG. 5 is a sequence diagram showing an example of BT communication for executing a high-security application requiring user authentication in cooperation between the mobile phone 10 and another electronic device 20. Note that description of portions common to the sequence in FIG. 4 is omitted.

  In FIG. 5, when the device search process and the service search process are completed, the mobile phone 10 on the master side sends a connection request (SessionManager.open) from the application to the application execution environment. Then, a screen requesting input of user authentication information (PIN: Personal Identification Number) is displayed on the display unit 125 of each of the mobile phones 10 and 20. When each user inputs predetermined user authentication information and the user authentication process is completed, the above-described connection establishment process is executed. Then, BT communication is performed between the master-side mobile phone 10 and the slave-side mobile phone 20 by executing an application. Thereafter, in each of the mobile phones 10 and 20, the communication history information that is temporarily stored in the internal memory 121 and includes information used for establishing a connection is not deleted and is left as it is.

As described above, according to the present embodiment, in the case of a connection request for requesting the user to input user authentication information when establishing a connection with the mobile phone 20 on the slave side which is another electronic device (FIG. 5). In this case, by performing user authentication based on the user authentication information input by the user, it is possible to prevent BT communication between the mobile phone 10 and the mobile phone 20 by an unauthorized user. . In this case, even if communication history information including information used for establishing a connection with the mobile phone 20 is left in the internal memory 121, communication by an unauthorized user can be prevented by the user authentication. The efficiency of the connection establishment process using information can be improved. On the other hand, in the case of a connection request that does not require the user to input the user authentication information (in the case of FIG. 4), communication history information including information used for establishing a connection with the mobile phone 20 is stored in the internal memory. By not leaving it in 121, it is possible to prevent BT communication with the mobile phone 20 by an unauthorized user who has illegally used communication history information. As described above, it is possible to improve security when information is transmitted / received to / from another mobile phone 20 by BT communication which is non-public wireless communication for short distance.

  In particular, according to the present embodiment, it is possible to determine whether or not to leave the communication history information in the internal memory according to the type of connection request generated by the application executed in the application execution environment. Also, BT communication with a mobile phone by an unauthorized user using communication history information including identification information (device information) of a mobile phone of a communication partner, identification information of a corresponding service, key information used for encryption of information, etc. Can be prevented.

  Although the preferred embodiments of the present invention have been described above, various modifications can be made to the disclosed embodiments within the scope of the technical matters described in the claims without departing from the scope or spirit of the present invention. Can be added. For example, the present invention is not limited to a mobile phone and can be applied to various mobile communication terminals that can execute a plurality of applications. That is, as the “mobile communication terminal” in the present invention, a PDC (Personal Digital Cellular) system, a GSM (Global System for Mobile Communication) system, a TIA (Telecommunications Industry Association) system mobile phone, an IMT (International Mobile Telecommunications) system, etc. -2000 standard mobile phone, TD-SCDMA (MC: Multi Carrier) mobile phone, one of TD-SCDMA (Time Division Synchronous Code Division Multiple Access), PHS (Personal Handyphone System), automobile phone And a telephone having a call function such as a fixed telephone. Examples of the “mobile communication terminal” include a communication terminal such as a PDA (Personal Digital Assistance) having a call function in addition to the above telephone.

  Further, in the above-described embodiment, the case where the other electronic device of the communication partner for short-range non-public wireless communication is a mobile phone has been described, but the present invention is a case where the electronic device is a mobile communication terminal other than the mobile phone The present invention can be similarly applied to a ticket gate device at a station or a cash register device at a store.

  In the above-described embodiment, the case where the short-range non-public wireless communication is a communication based on the Bluetooth (registered trademark) system has been described. However, the present invention is applicable to a short-range non-public wireless communication other than Bluetooth. Can be applied similarly.

  The processing and control in the mobile communication terminal can also be realized by executing a predetermined program on a computer provided in the mobile communication terminal. Delivery of the program used in the computer may be performed using a recording medium such as an FD or CD-ROM in which the program is recorded as digital information, or may be performed using a communication network such as a computer network.

1 is a schematic configuration diagram illustrating an example of a mobile phone according to an embodiment of the present invention. FIG. Explanatory drawing of the software structure in the mobile telephone which can execute an application. The sequence diagram which shows an example of BT communication for performing a low-security application in cooperation between mobile phones. The sequence diagram which shows an example of BT communication for performing in cooperation the application with high security which requires user authentication between mobile phones.

Explanation of symbols

10, 20 Mobile phone 111 Antenna 120 Main control unit 121 Internal memory 122 Wireless communication unit 127 Communication interface unit 128 Antenna

Claims (5)

A mobile communication terminal capable of communicating via a mobile communication network,
A communication interface unit that performs non-public wireless communication for short distance with other electronic devices;
A control unit that controls the communication interface unit to start the short-range non-public wireless communication based on a connection request;
A storage unit for storing information,
As the connection request, a connection request that requests the user to input user authentication information when establishing a connection with the other electronic device, and an input of the user authentication information when establishing the connection. Connection requests that do not require the user to be used,
The control unit
Start an application program capable of near-field non-public wireless communication in the master mode, and activate another application device capable of near-field non-public wireless communication activated in the slave mode and in a connection standby state. The search result is passed to the master mode application program. When another electronic device in the connection standby state where the slave mode application program is activated is found, the master mode application program is found. A connection establishment process for short-range non-public wireless communication with other electronic devices found based on the connection request generated by
When the short-distance non-public wireless communication with the other electronic device is completed, in the case of a connection request not requiring input of the user authentication information, the connection with the other electronic device is performed. A mobile communication terminal, wherein control is performed so that communication history information including information used for establishment is not left in the storage unit . The mobile communication terminal according to claim 1 , wherein
The mobile communication terminal, wherein the communication history information includes identification information of the electronic device used for establishing a connection with the other electronic device. In the mobile communication terminal according to claim 1 or 2 ,
The mobile communication terminal, wherein the communication history information includes identification information of a service used in communication with the other electronic device. In the mobile communication terminal according to claim 1, 2, or 3 ,
The mobile communication terminal characterized in that the communication history information includes key information used for encryption of information transmitted / received to / from the other electronic device.   A system comprising: the mobile communication terminal according to claim 1, and an electronic device capable of starting an application program capable of short-range non-public wireless communication with the mobile communication terminal. .

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